Nazgul

The Nazgul, are the nine servants of Sauron who were corrupted into service because of the nine rings of power they were given. They now serve him as ring wraiths, and are always on the search for the one ring which if found will bring Sauron back to power. There are nine altogether, they have one leader called the Witch king who is the most powerful. The Nazgul pretty much fail in every way to reclaim the ring, which leads to Saurons demise.